Description Of Each Control Operation; The Mainboard Design With Below Function; Basis Control Function; Cooling Mode - Tadiran Telecom SMVH09A-2A1B1NA Service Manual

Function and Control

6.2 Description of Each Control Operation

1. The mainboard design with below function

(1) Auto (2) Cooling (3) Dehumidifying (4) Air fan (5) Heating
2. Control
Indoor fan(Quiet、speed 1、speed 2、speed 3、speed 4、speed 5、Turbo), left and right louver, up and down
louver, buzzer,display, outdoor electric heater(option), outdoor power, healthy(option).

3. Basis control function

Cooling mode

(1) Setting Temp 16-31 degree,the indoor fan and louver run as the original mode.
(2) The indoor will run as original mode if the outdoor does not work,and the indoor will show error code.
Fan
(1) Setting Temp 16-31 degree,the indoor fan and louver run as the original mode.
(2) The indoor will run as original mode if the outdoor does not work,and the indoor will show error code.
Heating mode
(1) Setting temperature range 16-31 degree.
(2) It will in anti-cold air first when unit run in heating mode,and then heating.It will blow hot air after unit is off.
(3) Indoor power light blink and then indoor fan stop after unit entering defrost mode.
(4) Indoor blow hot air one minute if outdoor is malfunction.
(5) Indoor blow hot air 10 minutes after turn off unit when indoor fan is running.
4. Auto mode
(1) When environment temperature is equal or above 26 degree,and setting the cooling mode,the setting
temperature will reach 25 degree.
(2)When the environment temperature i is equal or below 19 degree plus additional temperature,it will run in
heating mode,and the setting temperature reach 20 degree at that time.
(3) When 1(9 degree +additional temperature,)<environment temperature<26 degree.It will run in airfan mode if it
is the first time entering auto mode.It will run in original mode if it change from cooling and heating mode.If original
mode is dehumidifying,it will be in airfan after change into auto mode.
5. Protect
(1)Anti cold air
The louver will be in horizontal level when evaporator temperature is too low,and indoor fan does not work or run in
low speed.
(2)Blow hot air
Indoor will run in few minutes before turn off when turn off in heating or indoor temperature above environment
temperature.
(3)Sensor malfunction
If the environment sensor or pipe sensor AD is above or equal 250 5s continually or the environment sensor or pipe
sensor AD is below 5 when the unit is on ,it means sensor malfunction.
(4)Motor blockage
When mainboard can not find the indoor fan speed continually,or motor fan run in low speed continually,
compressor outdoor fan,indoor fan and louver stop running.Indoor will show error code.
(5)Jumper malfunction
Un-install the jumper
(6)Communication malfunction
When the unit is running except for airfan mode,outdoor and indoor can not communicate 3 minutes.It will show
error code.
(7)Defrost
When outdoor condensing defrost,it will start defrost mode.
(8)Manually Defrost
Press the "FAN" and "MODE" 3s at the same time in heating mode,it will enter or exit the manually defrost,and
indoor will buzz.
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